|Publication number||US7229680 B1|
|Application number||US 09/666,813|
|Publication date||Jun 12, 2007|
|Filing date||Sep 21, 2000|
|Priority date||Sep 21, 1999|
|Also published as||CA2384031A1, CA2384031C, CN1170974C, CN1375023A, EP1214468A1, WO2001021878A1|
|Publication number||09666813, 666813, US 7229680 B1, US 7229680B1, US-B1-7229680, US7229680 B1, US7229680B1|
|Inventors||Kevin R. Crompton|
|Original Assignee||Microfibres, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (102), Non-Patent Citations (27), Referenced by (29), Classifications (22), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application claims priority from co-pending provisional specification 60/155,077, filed Sep. 21, 1999.
The present invention relates to flocked fabrics having superimposed embossed patterns and printed patterns creating a realistically three-dimensionally textured scene, illustration, or pattern.
Pile fabrics formed by flocking or other methods are frequently embossed to form a wide range of surface patterns and textures. Known methods for embossing a pile fabric include running the fabric through one or more cylinders bearing an engraved pattern thereon and subjecting the pile surface of the fabric to selective amounts of heat and pressure for selected periods of time in order to form depressed regions within the pile fabric corresponding to the engraved pattern on the cylinders. Another common method of embossing pile fabrics is through the use of air embossing equipment. Air embossing involves passing a pile fabric, while an adhesive to which the pile is adhered is still uncured, under one or more air streams and subsequently curing the adhesive. In typical methods for air embossing, the fabric is air embossed by passing the fabric under a cylinder including a plurality of apertures therein, and applying a pressurized air flow to an inside surface of the cylinder so that the air flows through the apertures in the cylinder, impinges upon the pile layer of the fabric, and forms depressions therein, which depressions are made permanent upon subsequent curing of the adhesive.
Printing and/or dyeing of fabrics, including pile fabrics, is also known in the art. Such prior art methods include submerging the fabrics in dye solutions, screen printing techniques, such as rotary screen printing, and transfer paper printing techniques, typically involving applying a surface of a printed transfer paper to a surface of a fabric and using heat and pressure to transfer a printed pattern from the transfer paper to the surface of the fabric. In typical prior art methods for forming pile fabrics, textured patterns and printed patterns are typically either not simultaneous present on a given fabric, or are essentially independent from each other and uncoordinated in appearance. Typical prior art pile fabrics include embossed and/or printed patterns that are typically characterized by essentially regular geometric shapes and features presenting an essentially uniformly appearing repeating pattern to the eye of the observer. Such prior art fabrics, and their methods of manufacture, while useful for many purposes, such as for upholstery, certain items of clothing (especially indoor clothing), etc., are not well suited for applications requiring fabrics which allow a wearer thereof, or an object covered therewith, to blend into a natural environment, and such prior art fabrics are not well suited for realistically depicting a printed scene or illustration.
There remains a need in the art to provide textured and printed flocked pile fabrics providing embossed and printed patterns thereon more realistically simulating a scene or illustration, for example a natural sylvan scene or illustration. The present invention provides textured and printed flocked pile fabrics, and methods for producing such fabrics, providing a more realistic visual effect or simulation of printed scenes or illustrations, which are especially useful in the context of camouflage or other fabrics for outdoor use and apparel.
The present invention is directed to unique flocked pile fabrics and methods for producing such fabrics. The fabrics provided according to the invention include an embossed pattern characterized by a plurality of elongated depressions in a surface of the pile fabric, and a superimposed printed pattern characterized by a scene or illustration including a plurality of visual features having elongated shapes. The inventive embossed, printed pile fabrics, having a superimposed embossed and printed pattern thereon, advantageously superimpose the embossed pattern and the printed pattern upon the pile fabric so that the embossed pattern imparts a three-dimensional texture to the scene or illustration comprising the printed pattern. The texture provided by the embossed pattern imparts a visual effect to the scene or illustration which renders it more realistic than a similar scene or illustration printed upon a conventional unembossed pile fabric. In one embodiment, this unique texturing effect is accomplished by substantially aligning the longitudinal axes of the elongate features of the printed pattern and the elongate features of the embossed pattern. The pile fabric provided by the invention may be produced by utilizing a plurality of embossing and printing techniques. In one preferred embodiment, the embossing technique comprises air embossing, and the printing technique comprises a transfer paper printing technique utilizing a paper transfer sheet. The fabrics provided by the invention are especially useful as camouflage fabrics. Such fabrics typically include a printed scene or illustration representing a sylvan setting dominated by visual features such as trees, branches, bushes, leaves, flowers, berries, grass, rocks, moss, etc.
In one aspect, a fabric is provided. The fabric comprises a substrate layer, an adhesive layer disposed on one surface of the substrate layer, and at least one layer of pile attached to and extending from the adhesive layer. The pile layer has an embossed pattern thereon. The embossed pattern includes a plurality of visually discernible regions having generally elongate shapes with longitudinal axes of the shapes being oriented substantially along a first direction. The pile layer further includes a printed pattern superimposed upon the embossed pattern. The printed pattern includes a plurality of visual features having generally elongate shapes with longitudinal axes of the shapes also being oriented substantially along the first direction.
In another embodiment, a fabric comprising a substrate layer, an adhesive layer disposed on one surface of the substrate layer, and at least one layer of pile attached to and extending from the adhesive layer is provided. The pile layer has superimposed thereupon an embossed pattern and a printed pattern. The printed pattern is characterized by a scene or illustration and the embossed pattern imparts a three-dimensional texture to the scene or illustration. The texture imparts a visual effect to the scene or illustration which renders it more realistic than the scene or illustration without the superimposed embossed pattern.
In another embodiment, a camouflage fabric is provided. The camouflage fabric comprises a layer of air-textured pile having printed thereon an illustration of a sylvan setting dominated by a component selected from at least one of the group comprising trees, branches, bushes, leaves, flowers, berries, grass, rocks and moss. The texturing comprising a random overlay on the illustration of depressions that are non-uniform in length and width.
In another aspect, a method for embossing and printing a pile fabric is disclosed. The method comprises embossing a pile fabric to form an embossed pattern thereon, where the embossed pattern includes a plurality of visually discernible regions having generally elongate shapes with longitudinal axes of the shapes being oriented substantially along the first direction. The method further comprises printing the fabric with a printed pattern that includes a plurality of visible features having generally elongate shapes with longitudinal axes of the shapes also being oriented substantially along the first direction.
In another embodiment, a method for embossing and printing a pile fabric is disclosed. The method comprises embossing a pile fabric to form an embossed pattern thereon, printing the fabric with a printed pattern, where the printed pattern is characterized by a scene or illustration, and orienting and superimposing the embossed pattern and printed pattern such that the embossed pattern imparts a three-dimensional texture to the scene or illustration. The texture imparts a visual effect to the scene or illustration which renders it more realistic than the scene or illustration without the superimposed embossed pattern.
In another aspect, a camouflage fabric is provided. The camouflage fabric is produced by a method comprising air embossing a pile fabric to form an air embossed pattern thereon, where the air embossed pattern includes a plurality of visually discernable regions having generally elongate shapes with longitudinal axes of the shapes being oriented substantially along a first direction. The method further includes printing the fabric with a printed pattern, where the printed pattern depicts an illustration of a sylvan setting that includes a plurality of visible features having generally elongate shapes with longitudinal axes of the shapes being oriented substantially along the first direction.
In another embodiment, camouflage fabric produced by a method comprising air embossing a pile fabric to form an air embossed pattern thereon and printing the fabric with a printed pattern characterized by a scene or illustration of a sylvan setting is produced. The method further involves orienting and superimposing the embossed pattern and the printed pattern during the printing step such that the embossed pattern imparts a three-dimensional texture to the sylvan setting, such that the texture imparts a visual effect to the sylvan setting which renders it more realistic than the sylvan setting without the superimposed embossed pattern.
In another embodiment a fabric is disclosed. The fabric comprises a substrate layer, an adhesive layer disposed on one surface of the substrate layer, and at least one layer of pile attached to and extending from the adhesive layer. The pile layer has superimposed thereupon an embossed pattern and a printed pattern. The printed pattern is characterized by a scene or illustration, and the superimposed embossed pattern imparts a three-dimensional texture to the scene or illustration that is characterized by the color and shading of the portions of the printed pattern superimposed on depressions of the embossed pattern visually differing from the color and shading of essentially equivalent portions of the printed pattern that are not superimposed on the depressions, thus yielding an enhanced visual representation of color and texture of the scene or illustration.
In yet another embodiment, a camouflage fabric is disclosed. The fabric comprises a layer of embossed pile having printed thereon a scene, illustration or pattern selected to visually blend into a surrounding environment in which the fabric is to be utilized. The fabric is also embossed with a texturing pattern that comprises an overlay on the scene, illustration or pattern of depressions that are shaped and oriented so as to create an embossed texture decreasing the degree of visual contrast between the camouflage fabric and the surrounding environment in which the fabric is to be utilized over that of the an equivalent camouflage fabric except without the embossed texture.
Other advantages, novel features, and objects of the invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings, which are schematic and which are not intended to be drawn to scale. In the figures, each identical or nearly identical component that is illustrated in various figures is represented by a single numeral. For purposes of clarity, not every component is labeled in every figure, nor is every component of each embodiment of the invention shown where illustration is not necessary to allow those of ordinary skill in the art to understand the invention.
The present invention provides flocked pile fabrics, and methods for producing such fabrics, which include both an embossed pattern and a superimposed printed pattern on the pile layer of the pile fabrics. The textured and printed pile fabrics produced according to the invention in some preferred embodiments, include printed patterns characterized by a scene or illustration of a setting, for example a natural scene or setting, and further include an embossed pattern superimposed thereupon, where the shape and character of the embossed features and the printed features together creates a visual effect which imparts a realistic three-dimensional texture to the scene or illustration.
A “scene or illustration” as used herein refers to a printed pattern including at least some printed features depicting one or more objects as they could appear to a viewer in their natural setting. It should be understood that such “scene or illustration” need not impart to such objects in a high level of realistic detail (e.g. photographic detail), so long as the identity of such objects are apparent to a typical viewer. “Imparting a realistic three-dimensional texture to a scene or illustration,” or “imparting a visual effect to a scene or illustration which renders it more realistic,” or “yielding an enhanced visual representation of a scene or illustration” as used herein refers to a superposition of the embossed features of the embossed pattern and at least some of the printed features of the scene or illustration creating a texture on such printed features which visually simulates the natural texture of the particular object depicted by the printed feature. As just one example, the a printed feature can depict a tree and the superimposed textured pattern on the printed feature can simulate the natural texture of tree bark.
In some particularly preferred embodiments the textured and printed pile fabrics produced according to the invention can comprise camouflage fabrics having printed thereon a scene or illustration, or other type of pattern, selected to visually blend into a surrounding environment in which the fabric is to be utilized so as to make the fabric less visible to a human or animal than a comparable fabric without the pattern. Any of a wide variety of patterns typically used and well known in the art for producing camouflage fabrics, including scenes or illustrations of sylvan settings (defined below) and/or geometric patterns, which are not scenes or illustrations but which enable a fabric to visually blend into a surrounding environment, can be used within the scope of the present invention and can potentially be improved in their camouflaging ability by the inventive texturing methods. By superimposing an embossed pattern upon a printed camouflage pattern on a pile fabric according to the teachings of the invention, the degree of visual contrast between the fabric and the surrounding environment for which the camouflage pattern is selected (i.e. the ease with which a typical human and/or animal viewer can visually distinguish and perceive an object covered with such fabric from the surroundings, as measured for example by the time after first viewing that such distinguishment takes place or the maximum distance at which such distinguishment can occur, etc., as would be apparent to those of ordinary skill in the art of camouflage) can be decreased over a similarly printed but untextured fabric. In preferred embodiments, the degree of visual contrast can be decreased by at least about 5%, more preferably at least about 10%, more preferably at least about 15%, and most preferably at least about 25%. For embodiments where the inventive techniques are used to decrease the visual contrast of camouflage fabrics, such decrease can occur via, for example, by imparting a visual effect to a scene or illustration of the camouflage pattern which renders it more realistic and/or by reducing the reflectivity of the pile surface of the fabric, thereby reducing the amount of glare produced by the fabric, and/or by other optical effects.
As explained in more detail below, such visual effects can be created, in some embodiments, by superimposing an embossed pattern, having a plurality of embossed regions with generally elongate shapes, which regions are preferably non-uniform in length and width, with a printed pattern that includes a plurality of visually dominant features (e.g., prominent foreground features) that are also generally elongate in shape and that are substantially aligned in a direction similar to that of the direction of orientation of the embossed pattern. When superimposed, such an embossed pattern and printed pattern can cooperate to form the overall visual effects mentioned above. The fabrics provided according to the invention are especially effective for providing realistic representations of textures for printed patterns characterized by scenes or illustrations representing a sylvan setting. Such fabrics are particularly well suited for use as camouflage fabrics, where the ability to blend in with natural surroundings, most typically sylvan surroundings, is important to the function and utility of the fabric.
A “sylvan setting,” or “sylvan scene,” or “sylvan illustration” refers herein to a setting, scene, or illustration pertaining to or characteristic of woods or forest regions. Such scenes or illustrations are typically dominated by visual features including, for example, trees, branches, bushes, leaves, flowers, berries, grass, rocks, moss, etc. As described in more detail below, the inventive method for superimposing an embossed pattern and a printed pattern depicting a scene or illustration representing a sylvan setting, can yield an embossed fabric where the embossed pattern, when superimposed with the printed pattern, is able to realistically simulate a bark-like appearance (i.e., is able to impart a realistic bark-like texture to the tress, branches, etc., of the printed scene or illustration as defined above).
A conventional flocked fabric 10, which is unembossed and unprinted, is shown in
Substrate 12 as shown is comprised of a woven fabric formed by warp yarns 20 and filling yarns 22. Substrate 12 can be formed from a variety of woven materials incorporating natural and/or synthetic fibers, or combinations thereof. In one particular embodiment, the substrate can comprise a poly-cotton blend of 65%/35% having a weight in the order of 3.0 to 3.5 oz/sq yd. While in the illustrated embodiment, a woven fabric is shown as a substrate, it should be understood that in other embodiments, substrate 12 may be any type of material suitable for flocking with a pile layer, such as a variety of woven fabrics, non-woven fabrics, knitted fabrics, porous or non-porous plastic and paper sheets, and the like, as apparent to those of ordinary skill in the art.
Adhesive layer 14 can be any conventional adhesive known in the art for use in fabricating flocked pile fabrics. Such adhesives include a wide variety of water based and/or solvent based adhesives. Also, as apparent to those of ordinary skill in the art, the adhesives may further include such components as viscosity modifiers, plasticizers, thermosetting resins, curing catalysts, stabilizers, and other additives well known in the art. The viscosity and composition of the adhesive chosen can be selected according to criteria readily apparent to those of ordinary skill in the art, including, but not limited to, the porosity and composition of substrate 12, the desired cure time and technique employed, the particular method of depositing pile fibers 18 onto the adhesive, the final weight and hand of the pile fabric desired, etc. In one particular embodiment, adhesive layer 14 comprises an acrylic polymer adhesive, which is applied on substrate 12 to have an essentially uniform thickness and a coating density of about 2.0 to 3.0 oz/sq. yd. of pile fabric. For a more detailed discussion of adhesives and various additives which can be used for forming adhesive layer 14, the reader is referred to U.S. Pat. No. 3,916,823 to Halloran, incorporated herein by reference.
Pile fibers 18 comprising pile layer 16 may similarly be comprised of a wide variety of natural and/or synthetic fibers according to the particular desired characteristics of pile fabric 10. In a preferred embodiment, pile layer 16 is comprised of pile fibers 18 formed from a synthetic polymer material. In even more preferred embodiments, pile fibers 18 comprise nylon fibers. Fibers 18 for flocking may be natural in color or dyed, depending on the particular application, and pile layer 16 may be formed of pile fibers 18 which are all of the same color, thus forming a pile face 16 having a solid color, or from a plurality of pile fibers 18 having different colors, thus forming a pile face 16 that is multicolored. For use in the present invention, where a printed pattern is transferred to the pile fabric, it is preferred to use pile fibers of the same color or undyed pile fibers.
The length of pile fibers 18, their denier, and the number density of the pile fibers on adhesive layer 14 can be varied over a relatively wide range and selected to yield a pile fabric having desirable characteristics for a particular application, as would be apparent to those of ordinary skill in the art. In one typical embodiment, pile fibers 18 can have an overall length between about 0.025 in and about 0.08 in, a denier between about 0.6 and about 3.5, and an overall pile density of between about 1.0 to about 3.5 oz/sq. yd. of fabric. Pile layer 16 can be deposited on the adhesive coated substrate, as discussed in more detail below, by a variety of methods conventional in the art, including the use of flocked depositing equipment of the beater bar type, or electrostatic flocking equipment, such as described in more detailed in commonly-owned U.S. Pat. No. 5,108,777 to Laird incorporated herein by reference.
A “generally elongate shape” as used herein refers to a shape having an aspect ratio differing from one or, in other words, having an overall length substantially greater than its overall width. In some embodiments, at least some features of a printed or embossed pattern have a generally elongate shape with an aspect ratio of at least about two, in other embodiments at least about five, in other embodiments at least about ten and in yet other embodiments at least about twenty. A “longitudinal axis” as used herein refers to a line which bisects an elongate shape along the direction of the shape's largest dimension. “Oriented substantially” or “substantially aligned” in a particular direction as used herein refers to longitudinal axes of features or regions being oriented so that they appear to be at least roughly visually aligned or correlated with the particular direction. Generally, the longitudinal axes of such regions will form an angle with respect to such a particular direction of that is less than about 45°, in some embodiments less than about 25°, and in some embodiments less than about 10°. It should be understood, however, that the orientation of the longitudinal axes of the elongate shapes with respect to a particular direction of the fabric, and the orientation of the longitudinal axes of features or regions of the with respect to each other may vary substantially from feature to feature without effecting the overall visual effect of a visual perception of alignment of the printed pattern, which visual effect defines herein whether the features or regions of the pattern are oriented substantially in the a given particular direction. It is also to be understood that, according to the invention, not every visible feature or region of the pattern need be oriented substantially along the given particular direction. For example, in some preferred embodiments, the printed pattern may, in addition to including substantially aligned visible features, can also include some number of visible features or regions which are not oriented substantially along the given particular direction. In such embodiments, such non-oriented visible features may typically comprise smaller, less visually prominent, or background features. In yet other embodiments, the inventive visual effects described above can be accomplished utilizing printed and/or embossed patterns having features without any substantial degree of visual alignment in a particular direction.
Referring again to
As discussed above, the present invention provides, in some embodiments, flocked pile fabrics including a printed illustration or scene or pattern and having an embossed pattern superimposed thereon, which embossed pattern is able to impart a thee-dimensional texture to the scene or illustration or pattern, which texture in turn imparts a visual effect to the scene or illustration that renders it more realistic to the viewer and/or renders it better able to blend into the surroundings than an equivalent scene or illustration or pattern but without the superimposed embossed pattern, for example as shown previously in
As shown most clearly in
The pile fabric can be embossed with embossed pattern 51 using a variety of well known and conventional techniques in the art including, but not limited to, embossing methods utilizing metal or rubber cylinders having an engraved pattern thereon that are used to apply heat and pressure to the pile fabric forming an embossed pattern within the pile fabric that is complementary to an engraved pattern on the cylinder, and air texturing and/or embossing techniques, where the depressions of the embossed pattern are formed by a flow of pressurized air impinging upon a flocked pile fabric. While any technique for embossing and/or texturing a flocked pile fabric known in the art can potentially be useful for producing the embossed patterns according to the invention, as described in more detail below, a preferred method for forming the embossed patterns according to the invention utilizes an air embossing technique.
A fabric made in accordance with a preferred embodiment of invention is best illustrated in
The unique and realistic texturing and visual effect discussed above is accomplished, in the illustrated embodiment of the invention, by superimposing printed pattern 32 and embossed pattern 51 so that the longitudinal axes 44 of certain prominent visible features of the printed pattern, such as tree trunks 38 are oriented substantially along a given direction 43, while the longitudinal axes 58 of a plurality of embossed depressions 52 are oriented substantially along a given direction 60, where direction 43, describing the overall visual alignment of features of printed pattern 32, and direction 60, describing the overall visual alignment of embossed pattern 51 are substantially aligned with respect to each other (i.e. each direction 60 and 43 is substantially aligned with respect to the other direction). In other words, the overall visual directional orientation 43 of printed pattern 32 is substantially similar to the overall directional orientation 60 of embossed pattern 51, thus creating a substantial degree of visual alignment between the features of the printed pattern and the embossed regions of the embossed pattern. It should be reemphasized at this point that the visual alignment of the printed pattern and embossed pattern which, according to some embodiments of the invention, creates a realistic texturing effect for a printed scene or illustration, is to be judged from the standpoint of its overall visual effect on the eyes of a typical viewer. In other words, as discussed previously, some fraction of the regions and features of the patterns may have longitudinal orientations which are substantially different from each other or from a given direction defining an overall orientation of the majority of the most visually prominent features or regions while still yielding the overall visual effect. In addition, the overall visual orientation of the printed pattern (e.g., along direction 43) and the overall visual orientation of the embossed pattern (e.g., along direction 60) need not be exactly parallel to each other in order to impart the inventive visual effects described above, but the overall orientations of the printed and embossed patterns are preferably aligned at least to a degree sufficient to impart a realistic texturing pattern to the scene or illustration printed on the pile fabric (e.g., for embodiments such as that shown in
One important feature of the inventive pile fabrics provided by the invention is the superposition of an embossed pattern and a printed pattern such that the embossed pattern supplies a texture to the scene or illustration or pattern depicted by the printed pattern, which texture provides a visual effect that more realistically simulates the natural texture of the scene or illustration depicted and/or renders the printed pattern better able to function as camouflage. Therefore, although in the embodiment illustrated in
For the embodiment shown in
Generally, it is preferable to create an embossed pattern, such as pattern 51 shown, which can be superimposed upon a printed pattern such that the features of each pattern are essentially randomly oriented with respect to each other, as defined above, in order to create a realistic visual texturing effect. As previously described, for such embodiments, the particular location of the embossed regions of the embossed pattern and the visual features of the printed pattern do not need to be positioned in any particular way with respect to each other. This may be accomplished, as in the illustrated embodiment, by utilizing printed patterns and embossed patterns each including features which are substantially similar, to other features within the pattern, in overall size, orientation, shape, and distribution across the entire surface of the pile fabric being created. In other words, such patterns advantageously enables a similar texturing effect over essentially their entire area in order to impart a realistic visual effect to the scene or illustration represented by the pattern. In other embodiments, but less preferably, the printed pattern may depict a scene or illustration having a series of discreet regions or features thereof which require different degrees or types of texturing in order to create a realistic visual effect. When such patterns are employed, the embossed pattern utilized for superimposing upon the printed pattern would include particular regions therein having differing types of embossed regions (i.e., having differing shapes, sizes, orientations, etc.) which would be correlated to particular features of the printed pattern, and which would have to be precisely aligned with such features, when superimposing the embossed pattern and printed pattern, in order to achieve a realistically textured visual effect. In such embodiments, the features of each pattern would not be essentially randomly oriented with respect to each other, as defined above. As will be described in more detail below, since the processes employed, in preferred embodiments, for embossing and printing patterns on pile fabrics are typically operated in a continuous fashion utilizing long rolls of fabrics, embodiments involving printed and embossed patterns each having features which must be precisely positioned with respect to each other are typically more expensive and difficult to implement in production and, therefore, are somewhat less preferred.
For embodiments where the embossed pattern is formed in the pile fabric using an embossing technique utilizing callendering of the pile fabric with engraved, heated rollers, the order in which the embossed pattern and the printed pattern are formed on the surface of a pile fabric is not particularly important. In one such embodiment, an unprinted unembossed pile fabric, such as fabric 10 shown in
The process for producing an embossed pile fabric, for example similar to fabric 50 shown previously in
Substrate 12, now coated with an adhesive layer, is then passed to flocking chamber 108, which includes a pile applicator 110. In flocking chamber 108, as is conventional for producing flocked fabric, a layer of flocking formed by a multiplicity of fibers 18 is applied to the adhesive. Conventionally, and as hereinafter described, this deposition may be achieved by conventional beater bar or electrostatic techniques in which the ends of the pile fibers 18 adhere substantially to the adhesive layer. Pile fibers 18, in preferred embodiments, are oriented essentially perpendicularly to the adhesive layer. In some preferred embodiments, flocking chamber 108 may comprise an alternating current electrostatic flocking device having a variable frequency alternating electrostatic field that optimizes flocked fiber characteristics and processing efficiency, such as that described in commonly owned U.S. Pat. No. 5,108,777 to Laird incorporated herein by reference.
After application of a pile layer, the flocked substrate 111 is passed under air embossing cylinder 112, which is in fluid communication with pressurized air supply line 114. As described in more detail below, air embossing cylinder 112 typically includes a cylindrical screen or stencil having perforations and solid areas therein. Also as described in more detail below, pressurized air from air supply line 114 is typically directed through the apertures or perforations in the cylindrical screen or stencil of embossing cylinder 112, in order to form the embossed depressions within the pile layer of the fabric. An embossed pattern is formed by deflection of pile fibers 18 in the pile layer by air flowing through the apertures within the cylindrical screen or stencil of embossing cylinder 112. Upon flowing through the apertures in the stencil of embossing cylinder 112 the air impinges upon pile fibers 18 and orients them in a direction that is dictated by the air pressure, flow, and size of the aperture through which the air passes. In other words, those portions of the pile layer passing underneath apertures within the cylindrical stencil will become oriented to form the depressions in the embossed pattern, whereas those portions passing under solid areas of the stencil will not be subject to substantial air flow or reorientation of pile fibers 18 in the pile layer. As will be apparent to those of ordinary skill in the art, it is important that the adhesive layer be in an uncured state during the air embossing procedure, such that the pile fibers 18 are not rigidly held by the adhesive and are able to have their position and orientation changed by an impinging air flow.
The air pressure and air flow impinging upon the pile layer should be sufficient to exert a force on pile fibers 18 in order to reorient the fibers. The particular air pressure and air flow utilized depends upon a variety of operating factors, such as, for example, the distance between the surface of the pile layer and the apertures of the stencil portion of embossing cylinder 112, the particular design of the air distribution system of embossing cylinder 112, etc. Those of ordinary skill in the art will be readily able to select appropriate air pressures, embossing cylinder configurations, and distances between the pile layer and the embossing cylinder in order to create the desired embossed pattern.
After being embossed by embossing cylinder 112, the pile fabric is passed through a curing chamber 116 in order to cure the adhesive layer so that the embossed pattern becomes permanently set. Curing chamber 116 may be comprised of essentially any conventional curing equipment that exposes the embossed, but uncured, pile fabric to radiation to effect curing of the adhesive layer. Typical curing chambers operate by exposing the flocked fabric to a source of radiation, such as ultraviolet radiation or heat. In some preferred embodiments, curing chamber 116 comprises a gas-fired air dryer, as is well known in the art, that exposes the flocked fabric to a flow of heated air to enable convective drying and curing of the adhesive. After being cured, the embossed flocked fabric 118 exits the curing chamber and is wound onto takeup roll 120. The speed at which the fabric is conveyed through air embossing system 100 can vary depending on a number of operating factors, as apparent to those of ordinary skill in the art. For some typical embodiments, the speed could be in the range of about, for example, 25 to 150 ft/min.
An embodiment of an embossing cylinder 112, which can be utilized for producing an embossing pattern similar to embossing pattern 51 shown previously in
Embossing cylinder 112 includes a cylindrical central region disposed above fabric 115 comprising a cylindrical screen or stencil 128, described in more detail below. The illustrated embodiment employs a conventional design for rotating the stencil 128 as fabric 115 passes thereunder. For example, in a preferred embodiment the air embossing system comprises a modified version of a commercially available air embossing system (Aigle Equipment Model No. AP-1, Burgano Toninese, Italy) as described in more detail in commonly owned co-pending International Application No. PCT/US00/13993, previously incorporated by reference. The illustrated rotating mechanism comprises a motorized drive unit 130, which includes a variable speed motor therein (not shown) which powers a conventional drive mechanism to rotate stencil 128 in the direction indicated by arrow 131. The drive mechanism for rotating the cylinder can be any suitable drive mechanism known in the art, including, but not limited to belt-drive, gear-drive, friction wheel-drive, inductive-drive, etc., as apparent to those of ordinary skill in the art. One preferred drive mechanism comprises a gear-drive mechanism in which a variable speed motor (not shown) in drive unit 130 rotates a gear (not shown) which, in turn, is engaged with a circumferential gear (not shown) comprising an outer surface of bearing flange region 134 of cylinder 112 within drive unit 130. In such an embodiment, the other end of cylinder 112 may be rotatably supported with bearing support 132 in which bearing flange region 135 is rotatably disposed. In other embodiments than that illustrated, embossing cylinder 112 may not include a separate motor drive mechanism as described, but rather may be passively rotated by the motion of fabric 115. Such passive drive mechanisms are useful for providing simple drive systems suitable for embodiments where it is desirable to synchronize the speed and direction of the embossing cylinder and the fabric. Such a passive drive mechanism is described in detail in U.S. Pat. No. 3,916,823 to Halloran, previously referred to.
Inserted into the interior portion of cylindrical stencil 128 is an air distribution lance 138, which, in preferred embodiments, extends substantially along the entire length of cylindrical stencil 128. In typical, conventional embodiments, a lower portion of air distribution lance 138 will include a series of holes therein, which holes run parallel to a longitudinal axis of lance 138 and provide fluid communication between pressurized air within lance 138 and the internal surface of cylindrical stencil 128. As illustrated, one end of air distribution lance 138 is configured for fluid communication with air supply line 114, while the other end of the lance is sealed. In alternative embodiments, both ends of air distribution lance 138 may be configured for attachment to a source of pressurized air. Air distribution lance 138 is preferably positioned with respect to cylindrical stencil 128 so that nozzles or holes in the air distribution lance 138 are positioned in close proximity to the lowest point of cylindrical stencil 128 (i.e. at a point such that the nozzles or holes in the air distribution lance which direct the flow of air to fabric 115 are as close as possible to the pile layer of fabric 115, in order to maintain a columnated air flow pattern against the flocked fabric to avoid diffusion and achieve a more precisely defined embossed pattern). A variety of conventional air distribution lances may be employed in the context in the present invention, as apparent to those of ordinary sill in the art. In preferred embodiments, however, an improved air lance, which is the subject of commonly owned co-pending International Application No. PCT/US00/13993, previously incorporated by reference, can be utilized to provide more precisely controlled air distribution, thus resulting in more sharply defined embossed patterns in the pile fabric. One embodiment of this improved air lance is described in greater detail below in the context of
Cylindrical stencil 128 can be conventionally formed from, for example, a cylindrical screen which has a series of solid, air impermeable regions 140 therein and a series of apertures 142 therein, which apertures permit air flow therethrough. Cylindrical stencil 128 can be formed in any manner conventionally used for forming such stencils. For example, in one embodiment, cylindrical stencil 128 can be formed using a well known lacquered screen process, where a cylindrical screen, typically constructed from a polymeric material such as polyester mesh, is coated with a lacquer. In forming the stencil, for such embodiments, the screen is first coated with an essentially uniform layer of lacquer, covered with a pattern template having regions that can block ultraviolet radiation, and exposed to ultraviolet radiation which tends to cure the lacquer. The regions of the screen beneath the pattern template regions that can block ultraviolet radiation will remain uncured after exposure and can be subsequently removed from the screen, thus leaving behind on the screen a lacquer coating, forming the stencil, having apertures therein with a pattern that is complementary to that of the pattern template. In another embodiment, the stencil can be formed by coating a metal screen with a patterned metallic layer using a Galvano process well known in the art. In yet other embodiments, cylindrical stencil 128 can be formed by directly covering a cylindrical screen with an air impermeable layer, such as a paper, plastic, or other air impervious layer, and then cutting out selected portions from the air impervious layer to form apertures 142. It is to be understood, of course, that regions corresponding to apertures 142 may be cut out of the air impervious layer prior to utilizing the layer to form cylindrical stencil 128. In other embodiments, cylindrical stencil 128 may be formed from a stencil typically employed for use in rotary screen printing operations or by any other methods apparent to those of ordinary skill in the art for forming air embossing stencils.
Apertures 142 in cylindrical stencil 128 result in the formation of embossed depressions 52 in embossed fabric 117 as air passes through the apertures and impinges upon fabric 115 as it passes under embossing cylinder 112. In preferred embodiments, the outer surface of the cylindrical stencil is positioned, during the embossing operation, as close to the top surface of the pile layer of the fabric being embossed as possible while avoiding actual contact. As is apparent in
One embodiment of an improved air distribution lance 160, referred to above, for use in certain preferred embodiments of an air embossing system is shown in more detail in
The air lance nozzle forming component 164 is secured lengthwise over the slot 172 in the main body 162 and extends away from the main body in the illustrated embodiment by about 1.25 inches. The slot 172 in the main body in one preferred embodiment has an essentially uniform width of about 5/16″ and extends in an essentially straight line for a preferred distance of about 64 in. The elongated nozzle forming component 164 is best illustrated in enlarged form in
Nozzle forming component 164 is formed with a longitudinally extending center recess 180 therein. An elongated air slit 182 forming the nozzle extends the length of nozzle forming component 164. The air slit 182 also extends the length of the recess 180 and forms a fluid communication path between the recess and the exterior environment. Air slit 182 in one preferred embodiment has a width of about 0.05 in. along its length. It should be noted that in other embodiments, the width of air slit 182 may be varied depending upon the configuration of the system and the desired embossing results. However, in general, the narrower the width of air slit 182 the greater is the detail possible to attain during the embossing process. For example, an air slit width of about 0.125 in. may be used in some embodiments but such a slit width is typically not capable of embossing the pile fabric with the same level of detail as an air slit width of about 0.05 in or less. Air slits with widths of substantially less than about 0.05 in. can provide even greater detail for embodiments where highly detailed embossed patterns are desired. For reasonable detail and for a visually significant improvement in performance over conventional air lances, the air slit 182 preferably does not substantially exceed about 0.2 in. in width.
In order to achieve even greater directionality of air flow through an embossing stencil and to further concentrate the flow of air towards the surface of the embossing stencil, a nozzle insert 166 can be employed. Insert 166 is preferably positioned within recess 180 formed in the nozzle forming component and is preferably aligned with slot 172 in main body 162. The insert, in a preferred embodiment, extending along the essentially the entire length of nozzle forming component 164 and comprising a series of honeycombed aluminum cells, each having a cross-sectional dimension of about ⅛″, a length in the direction of air flow exceeding the width of the air slit 182 by at least about a factor of four, and a wall thickness of the material forming the cells of about 0.002″ or less. The cells can direct air from the main body 162 with greater collimation and less turbulence through nozzle forming component 164, air slit 182, and onto the inner surface of the cylindrical embossing stencil (e.g., stencil 128 shown in
It is preferred to position air slit 182 close to the inside surface of the cylindrical embossing stencil in order to improve embossed detail. Preferably, the air sit should be positioned less than about 0.25 in. from the inside surface of the perforated cylindrical embossing screen or stencil.
In use, for example, in air embossing system 100 shown in
After the flocked fabric has been formed and embossed with air embossing system 100 as described above, the embossed pile fabric 118 can then be subjected to a printing process for transferring a printed pattern, for example a printed pattern depicting a scene or illustration such as a sylvan setting, onto the embossed surface of pile fabric 118. As discussed above, a wide variety of conventional means for applying a printed pattern to flocked fabrics can be potentially utilized for forming the printed patterns according to the present invention. For example, in one embodiment, a printed pattern can be formed on the embossed pile fabric utilizing a screen printing method with specially engraved screens for various colors of the printed patterns, for example as described in commonly owned U.S. Pat. No. 5,685,223 to Vermuelen et al. incorporated herein by reference. In preferred embodiments, the printed pattern is superimposed on embossed pile fabric 118 by utilizing a paper transfer printing process utilizing transfer paper having a printed pattern thereon. Such paper transfer printing processes are well known by those of ordinary skill in the art. Prior to printing the embossed fabric using a paper transfer printing as described below, in preferred embodiments, in order to prevent flattening and ironing out of the embossed pattern, the embossed fabric, after curing the adhesive, is heat set. A variety of heat setting methods and equipment known in the art can be employed. In one embodiment, the embossed fabric can be passed through an electric, infra red oven maintained at a temperature of between about 410° F. and about 420° F. for a time period on the order of a few seconds for heat setting.
One conventional and exemplary paper transfer printing process 200 is shown in
At contact point 220 of feed roller 212, tensioned Nomex blanket 224 forms a third layer comprising a transfer paper/pile fabric/Nomex blanket sandwich 230 which passes around heated callender 202. As is apparent from
After being exposed to heated callendering cylinder 202, transfer paper/pile fabric/Nomex blanket sandwich 230 passes from the heated callendering cylinder and around guide roller 231 at which point, the layers of the sandwich are separated, with the used transfer paper layer 236 passing to used paper roll 238, the embossed printed pile fabric 240 passing to finished product fabric windup roll 242 and Nomex blanket 224 completing the continuous loop by passing to guide roller 226.
When forming a uniquely realistic textured pile fabric depicting a scene or illustration according to certain embodiments of the invention, for example pile fabric 70 shown previously in
In addition to the realistic texturing effect provided by superimposing the embossed pattern and printed pattern, printing the embossed pile fabric with a printed pattern by utilizing paper transfer printing process 200 also can enhance the overall realistic visual effect imparted to the inventive fabrics by creating non-uniform color density and shading for regions of the printed pattern transferred to the embossed depressions on the embossed pile fabric as compared to regions of the printed pattern transferred to essentially smooth, unembossed regions of the pile fabric. This differential shading and color effect can be clearly seen be comparing the overall color density and shading of the printed but unembossed pile fabric 30 shown in the image of the fabric of
Those skilled in the art would readily appreciate that all parameters and configurations described herein are meant to be exemplary and that actual parameters and configurations will depend upon the specific application for which the systems and methods of the present invention are used. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments of the invention described herein. It is, therefore, to be understood that the foregoing embodiments are presented by way of example only and that, within the scope of the appended claims and equivalents thereto, the invention may be practiced otherwise than as specifically described. The present invention is directed to each individual feature, system, or method described herein. In addition, any combination of two or more such features, systems or methods, provided that such features, systems, or methods are not mutually inconsistent, is included within the scope of the present invention.
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|12||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Local Rule 56(A)1 Statement of Jul. 21, 2003.|
|13||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Local Rule 56(A)1 Statement of Sep. 22, 2003.|
|14||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Memorandum of Law in Support of Plaintiff, Intermark Fabric Corporation's Motion for Summary Judgment Under 35 U.S.C. §§ 102 and 103 of Sep. 22, 2003.|
|15||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Memorandum of Law in Support of Plantiff Intermark fabric Corporation's Motion for Summary Judgment of Jul. 21, 2003.|
|16||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Microbres, Inc.'s Local Rule 9(c)(2) Statement of Aug. 11, 2003.|
|17||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Microfibres for Summary Judgment Under 35 U.S.C. §§ 102 and 103 of Oct. 14, 2003.|
|18||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Microfibres Inc.'s Memorandum of Law in Support of its Objection to Intermark Fabric Corporation's Motion for Summary Judgment of Aug. 11, 2003.|
|19||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Microfibres, Inc.'s Local Rule 56(a)2 Statement of Oct. 14, 2003.|
|20||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Plaintiff Intermark Fabric Corporation's Answers to Defendant, Microfibres, Inc.'s First Set of Interrogatories of Aug. 12, 2003.|
|21||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Plaintiff Intermark Fabric Corporation's First Amended Answers to Defendant, Microfibres, Inc.'s First Set of Interrogatories of Aug. 21, 2003.|
|22||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Plaintiff Intermark Fabric Corporation's Memorandum of Law in Reply to Defendant's Objection to Plaintiff's Motion for Summary Judgment Under §§ 102 and 103 of Oct. 28, 2003.|
|23||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Plaintiff Intermark Fabric Corporation's Memorandum of Law in Reply to Defendant's Opposition to Plaintiff's Motion for Summary Judgment of Aug. 25, 2003.|
|24||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Plaintiff Intermark Fabric Corporation's Opposition to Defendant, Microfibres, Inc.'s Motion in Limine to Exclude Evidence Relating to "Best Mode" Defense of Sep. 25, 2006.|
|25||United States District Court for the District of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Second Amended Complaint of Apr. 12, 2004.|
|26||United States District Court of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Expert Rebuttal Report of David Brookstein, Sc.D. Matters Related to U.S. Appl. No. 5,981,021 of Jul. 31, 2003.|
|27||United States District Court of Connecticut (New Haven) bearing Docket No. 3:02-cv-01267-AVC - Plaintiff Intermark Fabris Corporation's Notice of Prior Art Under U.S.C. § 282 of Aug. 18, 2006.|
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|U.S. Classification||428/89, 428/919, 428/88, 428/90|
|International Classification||D06C23/04, D06B11/00, B32B33/00, B32B3/02, B32B3/26, B32B38/06|
|Cooperative Classification||Y10T428/23943, Y10T428/23929, Y10T428/23936, Y10S428/919, B32B2037/1072, D06B11/0076, D06C23/04, B32B38/06, B32B2459/00|
|European Classification||D06C23/04, D06B11/00J, B32B38/06|
|Feb 5, 2001||AS||Assignment|
Owner name: MICROFIBRES, INC., RHODE ISLAND
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CROMPTON, KEVIN R.;REEL/FRAME:011503/0679
Effective date: 20010123
|Nov 3, 2009||CC||Certificate of correction|
|Jan 17, 2011||REMI||Maintenance fee reminder mailed|
|Jun 12, 2011||LAPS||Lapse for failure to pay maintenance fees|
|Aug 2, 2011||FP||Expired due to failure to pay maintenance fee|
Effective date: 20110612